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 Failure of the No. 1 Bearing Vibration Sensor on Engine 1
 1. Possible Causes
_______________
 - EVMU (2EV)

 - wiring from the EVMU (2EV) to the vibration sensor (4002EV)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 77-32-34-000-042 Removal of the Engine Vibration Monitoring Unit (EVMU) AMM 77-32-34-400-042 Installation of the Engine Vibration Monitoring Unit (EVMU)
R  AMM 77-32-34-710-040 Operational Check of EVMU through CFDS AMM 77-32-34-860-041 Change the configuration of the Accelerometer ASM 77-32/02
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the Engine Vibration Monitoring Unit (EVMU) through the Centralized Fault Display System (CFDS) (Ref. AMM TASK 77-32-34-710-040).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message ENG1 BRG1 ACCEL:
 - do a check of the wiring from the EVMU (2EV) to the vibration sensor (4002EV) pins AA/1A, 2B to pins AA/2, 3 (Ref. ASM 77-32/02).
 (1) If there is no continuity:

 - repair the above wiring.

 (2) If there is continuity:

 - reconfigure the accelerometer to get the data from the TRF vibration sensor (Ref. AMM TASK 77-32-34-860-041).
 NOTE : The N1 bearing vibration sensor is not a LRU, replace it at
____
 the first shop visit.

 (3) If the fault continues:
 - replace the EVMU (2EV), (Ref. AMM TASK 77-32-34-000-042) and (Ref. AMM TASK 77-32-34-400-042).
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 B. Do the test given in Para. 3.A.
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ECES

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 TASK 77-30-00-810-810

 Failure of the No. 1 Bearing Vibration Sensor on Engine 2
 1. Possible Causes
_______________
 - EVMU (2EV)

 - wiring from the EVMU (2EV) to the vibration sensor (4002EV)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 77-32-34-000-042 Removal of the Engine Vibration Monitoring Unit (EVMU) AMM 77-32-34-400-042 Installation of the Engine Vibration Monitoring Unit (EVMU)
R  AMM 77-32-34-710-040 Operational Check of EVMU through CFDS AMM 77-32-34-860-041 Change the configuration of the Accelerometer ASM 77-32/02
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the Engine Vibration Monitoring Unit (EVMU) through the Centralized Fault Display System (CFDS) (Ref. AMM TASK 77-32-34-710-040).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message ENG2 BRG1 ACCEL:
 - do a check of the wiring from the EVMU (2EV) to the vibration sensor (4002EV) pins AA/1A, 2B to pins AA/2, 3 (Ref. ASM 77-32/02).
 (1) If there is no continuity:

 - repair the above wiring.

 (2) If there is continuity:

 - reconfigure the accelerometer to get the data from the TRF vibration sensor (Ref. AMM TASK 77-32-34-860-041).
 NOTE : The No. 1 bearing vibration sensor is not a LRU, replace it at
____
 the first shop visit.

 (3) If the fault continues:
 - replace the EVMU (2EV), (Ref. AMM TASK 77-32-34-000-042) and (Ref. AMM TASK 77-32-34-400-042).
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 B. Do the test given in Para. 3.A.
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